Published on April 22, 2014
WHAT IS CCNA…??WHAT IS CCNA…?? A-set Training and Research Institute
CONTENTSCONTENTS A-set Training and Research Institute
CISCO ICONS AND SYMBOLSCISCO ICONS AND SYMBOLS 4
IP ADDRESSINGIP ADDRESSING
ROUTER AS A COMPUTERROUTER AS A COMPUTER Data is sent in form of packets between 2 end devices Routers are used to direct packet to its destination
IP ROUTING..IP ROUTING..
RIP(ROUTING INFORMATIONRIP(ROUTING INFORMATION PROTOCOL)PROTOCOL)
RIP SETUPRIP SETUP
COMMANDS USED..COMMANDS USED..
COMMANDS USED BY RIPCOMMANDS USED BY RIP Command Command’s purpose Rtr(config)#router rip Enables RIP routing process Rtr(config-router)#network Associates a network with a RIP routing process Rtr#debug ip rip used to view real time RIP routing updates Rtr(config-router)#passive-interface fa0/0 Prevent RIP updates from going out an interface Rtr#show ip protocols Used to display timers used by RIP
FRAME-RELAYFRAME-RELAY Frame Relay is packet-switched technology. Frame Relay follows principle of packet-switched technology. Packet-switched networks allow dynamically share the network medium and the available bandwidth to the end to end stations
DLCI(DATA LINK CONNECTION IDENTIFIER) & LMIDLCI(DATA LINK CONNECTION IDENTIFIER) & LMI (LOCAL MANAGEMENT INTERFACE)…(LOCAL MANAGEMENT INTERFACE)…
COMMANDS USEDCOMMANDS USED
ACLS (ACCESS CONTROL LISTS)ACLS (ACCESS CONTROL LISTS) ACLs are lists of conditions that are applied to traffic traveling across a router's interface. These lists tell the router what types of packets to accept or deny. Acceptance and denial can be based on specified conditions. ACLs can be configured at the router to control access to a network or subnet. ACLs must be defined on a per-protocol, per direction, or per port basis. There are three types of ACLs 1. Standard 2. Extended 3. Named
REASONS TO CREATE ACLSREASONS TO CREATE ACLS 1. Limit network traffic and increase network performance. 2. Provide traffic flow control. 3. Provide a basic level of security for network access. 4. Decide which types of traffic are forwarded or blocked at the router interfaces. For example: Permit e-mail traffic to be routed, but block all telnet traffic. 5. Allow an administrator to control what areas a client can access on a network. 6. If ACLs are not configured on the router, all packets passing through the router will be allowed onto all parts of the network.
NAT Translates between local addresses and public ones Many private hosts share few global addresses Public Network Uses public addresses Public addresses are globally unique Private Network Uses private address range (local addresses) Local addresses may not be used externally NAT: Network Address TranslatorNAT: Network Address Translator
NETWORK SWITCHES..NETWORK SWITCHES.. A network switch is a small hardware device that joins multiple computers together within one Local Area Network(LAN). Technically switches operate at Data-link Layer. These are almost like HUBS. But unlike HUBS network switches are capable of inspecting data as it is recieved, determining the source and destination device of each packet, and forwarding them appropriately.
VLAN (VIRTUAL LAN)VLAN (VIRTUAL LAN) VLAN provides Virtual Segmentation of Broadcast Domain in the network. The devices, which are member of same Vlan, are able to communicate with each other. The devices of different Vlan may communicate with each other with routing called Inter Vlan Communication.
VLAN TRUNKING PROTOCOL (VTP)VLAN TRUNKING PROTOCOL (VTP) With the help of VTP, we can simplify the process of creating Vlan. In multiple switches, we can configure one switch as VTP server and all other switches will be configured as VTP client. We will create Vlans on VTP server switch.
SERVER SWITCHSERVER SWITCH
CLIENT SWITCHCLIENT SWITCH
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